Structural steel for carburization 18NiCr5-4, 1.5810, 18NiCr6-4, 20NC6 for heavy-duty gears according to EN 10084.
| Standard | Steel Grade | |||||||
|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | ||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Al: | |
| EN/DIN | 18NiCr5-4 - 1.5810 - 18NiCr6-4 | |||||||
| 0.16 - 0.21 | 0.6 - 0.9 | <0.4 | <0.025 | <0.035 | 0.9 - 1.2 | 1.2 - 1.5 | - | |
| NF | 20NC6 | |||||||
| 0.16 - 0.21 | 0.6 - 0.9 | 0.10 - 0.35 | <0.030 | <0.025 | 0.9 - 1.2 | 1.2 - 1.5 | >0.02 | |
18NiCr5-4, 1.5810 - specifications and application
Carburizing steel for particularly heavy-duty gear wheels of machines and vehicles.
Mechanical properties of 18NiCr5-4, 18NiCr6-4, 1.5810
- Hardness in +A condition: <223 HBW
- Hardness +TH condition: 170 - 223 HBW
- Hardness +FP condition: 156 - 207 HBW
- Hardness in +S condition: <255 HBW
Heat treatment of 18NiCr5-4, 1.5810
- Austenitization at 880 ℃ for approx. 30-35 minutes
- Carburization at 880 - 980℃
- Hardening at a temperature of 780 - 820℃
- Tempering at a tempering of 150-200℃ for about 1 hour.
In the above mentioned grades the company provides:
- Round hot-rolled bars 18NiCr5-4, 1.5810, 18NiCr6-4
- Forgings and forged bars 18NiCr5-4, 1.5810, 18NiCr6-4
Other replacements and equivalents
18NiCr5-4, 1.5810, 18CrNi5-4, 18NiCr6-4, 18CrNi6-4, 20NC6, F-1580, 20 NC 6.